Yes. I didn't put code because using the zonemager.I will try to attach all the entities and meshes to regions before zonemanager unloads them.Is possible that zonemanager crashes when it try to unload not attached meshes?

Thanks.

P.S.: Do you remember when we talk about uvanim and animated texture, on the IRC?I've tried uvanim with billboards but it doesn't works. It's only for meshes.